Dynamic magnetic information storage or retrieval – Converting an analog signal to digital form for recording;...
Patent
1997-04-09
1999-12-07
Psitos, Aristotelis M.
Dynamic magnetic information storage or retrieval
Converting an analog signal to digital form for recording;...
360 65, 375346, 375350, 3647241, G11B 500, G11B 5035
Patent
active
059993472
ABSTRACT:
A recording and/or reproducing apparatus for recording and/or reproducing digital audio signal on a recording medium such as a magnetic tape, which includes a recording and/or reproducing unit, an analog-to-digital convertor, a decimation filter, and noise shaper. The recording and/or reproducing unit records and/or reproduces signal on a recording medium at a speed double relative moving speed of a head and the recording medium at least. The analog-to-digital convertor converts input analog audio signal into digital signal with a sampling frequency which is above the audio frequency band, and sufficiently higher than the maximum frequency capable of recording by the recording and/or reproducing unit. The decimation filter reduces the sampling frequency of the digital signal output from the analog-to-digital convertor, and converts it into digital signal of m-bit (m>n). The noise shaper converts the digital signal from the decimation filter from m-bit to n-bit, and then in requantizing, shapes noise so as to suppress within the audio frequency band, and supplies it to the recording and/or reproducing unit.
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Ichimura Gen
Inomata Yuichi
Noguchi Masayoshi
Ueki Masaaki
Yamada Makoto
Neal Regina Y.
Oh Seong-Kun
Psitos Aristotelis M.
Sony Corporation
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